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    Question

    Which of the following statements about the modern

    periodic table is NOT correct?
    A There are seven periods in the periodic table Correct Answer Incorrect Answer
    B Period 1 has only one element Correct Answer Incorrect Answer
    C The periodic table is arranged in order of atomic number Correct Answer Incorrect Answer
    D There are 18 groups in the periodic table Correct Answer Incorrect Answer

    Solution

    The statement that is NOT correct is: Period 1 has only one element Period 1 of the periodic table actually has two elements: Hydrogen (H) and Helium (He).

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